feat: publish Tend v0.2 preview source

Publish the reviewed allowlisted snapshot whose exact binary completed maintenance deployment, rollback, and reactivation exercises for Gamertan and Sandwich Hime.

Private-Source-Commit: 4d7094c8b7c61991bfb67b11fc1558724c874eb2

Private-Source-Tree: 54a2f74804f7acddf3755d7d4da5b97f5fc28381

AI-Assistance: OpenAI Codex assisted implementation, testing, security review, and release verification.
Signed-off-by: Cole Speelman <crspeelman@gmail.com>

scripts/public-snapshot.allow

@@ -9,12 +9,25 @@ cmd/tend/main.go
 docs/ARCHITECTURE.md
 docs/DOGFOOD_EVIDENCE.md
 docs/PUBLIC_SNAPSHOT.md
+docs/SCHEMA_V2_MIGRATION.md
 docs/THREAT_MODEL.md
+docs/WALKTHROUGH.md
 examples/LICENSE
 examples/README.md
 examples/blue-green/caddy-handler.template
 examples/blue-green/example-site@.service
 examples/blue-green/tend.json
+examples/local/.env.example
+examples/server/authorized_keys.example
+examples/server/environment/docs-site.env.example
+examples/server/environment/example-site.env.example
+examples/server/example-singleton.service
+examples/server/receive-policy.json
+examples/server/services/docs-site.json
+examples/server/services/example-site.json
+examples/server/slots/example-site-blue.env
+examples/server/slots/example-site-green.env
+examples/server/tend-receive.sudoers
 examples/singleton/tend.json
 go.mod
 internal/config/config.go
@@ -22,6 +35,7 @@ internal/config/config_test.go
 internal/deploy/deploy.go
 internal/deploy/deploy_test.go
 internal/deploy/lock_linux.go
+internal/deploy/lock_linux_test.go
 internal/deploy/lock_other.go
 internal/deploy/operator.go
 internal/deploy/operator_test.go
@@ -33,8 +47,17 @@ internal/packager/packager.go
 internal/packager/packager_test.go
 internal/process/run.go
 internal/provenance/git.go
+internal/serverpolicy/ownership_linux.go
+internal/serverpolicy/ownership_other.go
+internal/serverpolicy/policy.go
+internal/serverpolicy/policy_test.go
 internal/state/state.go
 internal/state/state_test.go
+internal/transport/protocol.go
+internal/transport/protocol_test.go
+internal/transport/push.go
+internal/transport/push_test.go
+internal/transport/receive.go
 internal/version/version.go
 internal/version/version_test.go
 release/tend.json